What’s more, Arrowstar Stephen Amell is teasing that another face from the franchise’s past will be returning for “Elseworlds.” If you follow him on social media, you’ll have seen that he shared a photo of himself on Twitter yesterday alongside Colin Donnell AKA Tommy Merlyn, Oliver Queen’s best friend who was a regular on Arrow back in season 1 until the character’s untimely death.

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Now, obviously Amell doesn’t spell out for us that Donnell’s appearing as Merlyn in the crossover, but it’s clear that this snap was taken on the “Elseworlds” set, as Stephen’s dressed in the Flash suit which he’ll wear in the event, as he and Grant Gustin will be swapping roles for one time only. His use of a couple of “mind blown” emojis also hint that he’s revealing something big to us here.

That said, Jensen Ackles recently visited the set and it’s been confirmed that, no, the Supernatural star is not going to appear in “Elseworlds.” So maybe Donnell was likewise just checking in on his old pals? However, it’s worth pointing out that the actor was in last year’s crossover as the Earth-X version of Tommy, Prometheus-X. Could they repeat the trick this year and use the reality-warping storyline to get the former Arrowstar back for another cameo?

We’ll find out when “Elseworlds” airs on The CW on the week beginning Sunday, December 9th.